Electric brazing machine



A. T. .KOEHLER July 31, 192s.

ELECTRIC BRZING MACHINE I N V EN TOR.

gagement with the eyes 13.

Patented July 31, 1928.

VALBERT fr. konnten, orroNTIAc, MIGHIGAN. Q

ELECTRIC BRAZING iunoniivnl I Appiietipn mea inn 1o, i927. 'serial No. 197,501.

This invention relates to improvements in electric brazin'g machines, and refers :more

particularly to brazing machines'V intended for such purposes asbrazing the ends of lband saw blades. j

The inventI on aims to provide, among other things, an electric brazing machine' wherein a y.band saw blade, orother article, may be held firmly adjacent toits ends `with `the latteroverlapping'sothat tli'eyrliev exactly over one another; wherein electric c onnections are attached to` the vsupporting members so that a'circuit is completed through the endsto be brazed; wherein means are provided for pressingjthe ends)V together after the` solder between them has Vbeen l fused so that vas it hardens a flat, joint is made; and'wherein joint may' be very quicklyandeasilymade` l WVith thesefand other "objects in view which willfbecome apparent vas the specifi-l cation proceeds, the invention is hereinafter more fully" described with theaid ofthe accompanying drawing'sinfwh'ich: .r A

Figure l is a .planyiew o f'the invention. 'j Figures 2, 3 and 4 are sections on the lines 2-2, 3-3 and 4-4 respectively ofFigure 1.

Figure 5 is a detail`on an enlarged scale.

Referring to the drawings, 1V vdesignates a table mounted on uprights Zover a base 3. Itwill be noted that Ventilating openings 4 are provided through` theuprights.

On the table are two angle members 5 and 6 held in position asby. vboltsrj? and8'... These angle membersare' substantially' in linewith one another and have their adjacent -ends spaced apart,"V On one sidebf these angle membersang'le brackets 9 "and 1Q are. so -secured that they also are substantially in line with one another and have their adjacent ends substantially thev same distance from one another as the adjacent ends of the angle members. The supporting flanges 92L and 1()a ofthe angle brackets are adapted to support the band saw blade portions V11 and 11 adjacent to the joint 11b as shown in Figure 5.

Through each angle member and its bracket threaded projections 12 extends so that the threaded eyes 13 integral with these projections extend over the supporting flanges 9a and 10a. Nuts 14 are in threaded engagement with the projections 1Q: thereby holding the angle members and their brackets together. Screws 15 are in threaded en- Clamping plates16 and V17 are placed over 4the supporting vflanges 9a and .10a respectively; each plate "is mounted on 'the lower.` end ofone of the 'screws 15v soA that each screw and plate move ltogether vertically, but so that the f 1,679,088 v' Fic-E.

screws: mayturn independently of their Y L plate s. ThisV is usually accomplishedby providing annular grooves 18 `around the screws towards their lower ends, and insert-V ing pins' 19 horizontallyfthrough the plates 16 land 17 in suoli a manner thattthey rest partly in' the vsaid grooves.

yBetween the supporting flanges 9? and 10a and spacedfrom both of them a block 2O is secured to the table 1; the upper surface of thisblock is substantially level with the supporting flanges" 'O11 the' table fulcrum" brackets 21'are4 also secured between which a lever 22 is pivotallymounted. MIntermediatelyof its length thislever has a pressure plate 23 thereon, which is .so positioned thatV when the lever is pulled downtwill strike the topI of the block. A spring 24 is so arranged as to normally' hold the `lever in raisedpositionas indicated at 22zi in Fig- On the base a primary and secondary "windings 26 and 27 is located. 28indicates -a'sourc'eA of energy and`y29 is a switch, so that connection may be'made throughfeither lead 30 orBOa and either a part oralljof the primarywinding utilized. Q32 is af wire from Vthe source of energy `to 'the' primary winding 26'. j From thefsecondary `winding 27 fwiresv 33 and 34 transformer 25, having YVItfwill be noted that inthe construction shownf the table: 1 is made of wood lwhif'il'i proves quite satisfactory on account of the low voltage employed. may be used therefor so long as the screws 7 and 8 and the angle members 5 and 6 are But other material insulated from one another and also from the block 20.

Band saw blade portionsll and 11- adjacent to their ends are clamped between the supporting flanges 9a and 10a and their respective clamping plates 16 and 17; the

ends of the blade portions should preferably be bevelled 1 as indicated4 in Figure 5."

elled surfaces at 1lb where the joint is to be made and the current is turned on. As Y Moreover. the invention, while described as appliedvfor brazing band saw blades may. of course be adapted for kindred uses.

What Iclairn is: I, 1. A device of the character described comprising ar table having brackets thereon, said,V

brackets beiner insulated from one another, asupporting ange on each of said brackets, said flanges being substantially inline. with one another, clamping plates vertically movableover said flanges and supported by. said bracket-s, a I iXed block betweenthe adjacent ends of saidy flanges having its upper surface substantially levelv with said fianges and in#v sulated from them, a lever. pivotally mounts ed on saidtable, and a pressure plate onsaid lever adapted to bear down` on said iixed block, in'combination with anelectric.v circuit having a wire -connected to each of said brackets so thatv said circuit is adapted to beclosed by pieces of conducting material extending inwards from saidV supportingv flanges and coming in contactwith. one-another over saidl block.

2. An electric brazing machine comprising a table having angle members mounted ftheref onfvsubstantially in line -with one another, spaced apart, and insulated fromone an-l other, forwardly extending flanges on said members terminating substantially flush with the adjacent ends of said members, forwardf ly Vextending eye-s on said members having threaded openingsl therethrough, screws in threadedengagement with said eyes, clamping plates on the lower ends of said screws adapted to move vertically over said flanges, a fixed block on said table between and horizontally. substantially.4 in line with said ianges and insulated from them, a lever pivotally mounted* on said table, and a `pressure plate 011 said lever adapted to contact with said'fixed'block, each flange andV its clamping plate being adapted to hold a bandsaw blade portion adjacent to one of its ends so that said end-s are in contact with one anotherover saidy fixed block, in combination with an electric circuit having a wire connected to eaehof said angle members so that said circuitis closed through said contacting band-saw blade ends.

3.. An electric brazing machine comprising va table; having angle members mounted thereon, substantially in line with one another, `spaced apart, and insulated from one an,-

other, anglebrackets having forwardly eX- tendng'supporting flangessecured to said angle members, eyes having threaded openings therethrough extending forwardly from said angle brackets, screws in threaded engagement with said threaded openings, clamping plates on the lower ends of the screws adapted'to move'vertically over said supporting flanges, a block between the adjacentv kends of said' flan es and insulatedfrom them, a lever pivotal yy mounted on said table, a pressure-plate on'said ylever adaptedv to contact said block, and spring means adapted to hold said lever upwards so that said pressure plate is out of contactA from said block, in combination with an electrick circuit having a wireconnected to each of said angle members. so that said circuit is adapted to be closed'by piecesof conducting material extending inwards from said .flangesand heldthereon by said clamping plates, said pieces of conducting material being in Contact with one another at rtheir ends. Y Y

ALBERT T. KEHLER; 

